Compiled on RPI3B with 5.10.77-piCore-v8

Compile Flags:
CFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto -fuse-linker-plugin -fno-exceptions'
CXXFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto -fuse-linker-plugin -fno-exceptions -fno-rtti'
LDFLAGS='-Wl,-O1'
export CFLAGS CXXFLAGS LDFLAGS

Dependencies:
compiletc
python3.8-meson
llvm-bin

Commands:

# fix lto
P=/usr/local/libexec/gcc/aarch64-unknown-linux-gnu/10.2.0/liblto_plugin.so.0.0.0
sudo mkdir -p /usr/local/lib/bfd-plugins
sudo ln -sfv $P /usr/local/lib/bfd-plugins/liblto_plugin.so

tar -xf r53.tar.gz

cd inih-r53

mkdir build && cd build

# https://mesonbuild.com/Builtin-options.html#build-type-options
CC='gcc' CXX='g++' meson --prefix=/usr/local --strip --buildtype=custom --default-library=both --optimization=s -Ddebug=false

# check compile_commands.json to verify the flags

time ninja
real    0m 7.93s
user    0m 10.34s
sys     0m 1.50s

DESTDIR=/tmp/packing-inih ninja install

cd /tmp/packing-inih/usr/local/lib

llvm-strip --strip-unneeded libINIReader.a libINIReader.so.0 libinih.a libinih.so.0